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    FARWEST: Efficient Computation of Wave-Particle Interactions for a Dynamic Description of the Electron Radiation Belt Diffusion

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    Authors
    Dahmen, N.
    Sicard, A.
    Brunet, A.
    Santolik, O.
    Pierrard, V.
    Botek, E.
    Darrouzet, F.
    Katsavrias, C.
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    Discipline
    Physical sciences
    Subject
    radiation belts
    wave particle interaction
    diffusion equation
    data assimilation
    cold plasma density
    magnetospheric VLF waves
    Audience
    Scientific
    Date
    2022
    Metadata
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    Description
    In this paper, we present a new method to compute rapidly, wave particle interaction induced pitch angle and momentum diffusion coefficients. Those terms are normally obtained by the numerical solving of equations based on the quasi-linear theory. However, this bulk resolution leads to a high computational cost, preventing the integration of plasma density and VLF waves nowcasts and forecasts. Therefore, and in the context of the SAFESPACE project (H2020), we implemented a new wave particle interaction code called FARWEST (FAst Radiation diffusion with Waves ESTimator), with an efficient interpolation based method. The proposed implementation was validated against reference results obtained by WAPI, ONERA's wave particle interaction legacy code, with a substantial reduction of the computing time while conserving the physical accuracy of the generated coefficients. The FARWEST code is later used to measure the impact of a time-dependent plasma density distribution (numerically computed by BIRA's plasmaspheric model SPM) on the coefficients and on the representation of the electron flux map by Salammbô, ONERA's radiation belt code.
    Citation
    Dahmen, N.; Sicard, A.; Brunet, A.; Santolik, O.; Pierrard, V.; Botek, E.; Darrouzet, F.; Katsavrias, C. (2022). FARWEST: Efficient Computation of Wave-Particle Interactions for a Dynamic Description of the Electron Radiation Belt Diffusion. , Journal of Geophysical Research: Space Physics, Vol. 127, Issue 10, e2022JA030518, DOI: 10.1029/2022JA030518.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/10232
    doi: http://dx.doi.org/10.1029/2022JA030518
    scopus:
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
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